Toronto 
Millions of Canadians who received mixed doses of COVID-19 vaccines, like one dose of AstraZeneca and one dose of mRNA vaccine, Pfizer or Moderna can travel to the U.S when the land border opens next month.
Though the CDC has not recognized the practice of mixing COVID-19 vaccine doses, the agency has updated the guidance as it is a common practice in many countries across the world including Canada.
The updated vaccine guidance on the CDC website states, “For the purposes of interpretation of vaccination records, individuals can be considered fully vaccinated ≥2 weeks after receipt of the last dose if they have received any single dose of an FDA approved/authorized or WHO EUL approved single-dose series (i.e., Janssen), or any combination of two doses of an FDA approved/authorized or WHO emergency use listed COVID-19 two-dose series.”
“The recommended interval between the first and second doses of FDA-approved/authorized and WHO-EUL listed vaccines varies by vaccine type. However, for purposes of interpretation of vaccine records, the second dose in a two-dose heterologous series must have been received no earlier than 17 days (21 days with a 4 day grace period) after the first dose.”
The United States will reopen land and ferry ports of entry for non-essential trips by fully vaccinated travellers from Canada and Mexico on November 8th.
The latest vaccine policy by the U.S. requires all foreign national travellers by air, land and water to be fully vaccinated beginning November 8th.
Currently, all airline passengers to the United States must provide a negative COVID-19 test taken within three days of travel.
Though a negative COVID-19 test is not required, visitors entering the United States will need to show proof of vaccination, if asked for, at the land/ferry border.
Further information on the type of documentation for vaccine proof is yet to be announced.
